<template>
  <div>
    <h1 v-text="msg" id="title" ref="title"></h1>
    <button ref="btn" @click="showDOM">点我输出上方的DOM元素</button>
    <School ref="sch" id="sch"/>
  </div>
</template>

<script>
//引入School组件
import School from "./components/School";

export default {
  name: "App",
  components: { School },
  data() {
    return {
      msg: "欢迎学习Vue",
    };
  },
  methods: {
    showDOM() {
      // console.log(document.getElementById("title"));
      console.log(this.$refs.title);  //真实DOM元素
      console.log(this.$refs.btn);  //真实DOM元素
      console.log(this.$refs.sch);  //School组件的实例对象(vc)
      console.log(document.getElementById("sch"));  //拿到的School组件中DOM
    },
  },
};
</script>

